package com.ljm.redischarts.wjm.config;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;
import org.springframework.util.Assert;

import java.nio.charset.Charset;

public class FastJson2JsonRedisSerializer<T> implements RedisSerializer<T> {
    @SuppressWarnings("unused")
    private ObjectMapper objectMapper=new ObjectMapper();

    public static final Charset DEFAULT_CHARSET=Charset.forName("UTF-8");

    private Class<T> clazz;

    static{
        ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
    }

    public FastJson2JsonRedisSerializer(Class<T> clazz){
        super();
        this.clazz=clazz;
    }
    @Override
    public byte[] serialize(T t) throws SerializationException {
        if(t==null){
            return new byte[0];
        }
        return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
    }

    @Override
    public T deserialize(byte[] bytes) throws SerializationException {
        if(bytes==null||bytes.length<=0){
            return null;
        }
        String str=new String(bytes,DEFAULT_CHARSET);
        return JSON.parseObject(str,clazz);
    }

    public void setObjectMapper(ObjectMapper objectMapper){
        Assert.notNull(objectMapper,"'objectMapper' must not be null");
        this.objectMapper=objectMapper;
    }

    protected JavaType getJavaType(Class<?> clazz){
        return TypeFactory.defaultInstance().constructType(clazz);
    }
}
